Widget id is empty for new created widgets

[mb74]

When I create a new widget the id is empty. In older versions a default id was created, which is the expected behavior.
Problems arise when the id is left empty because when the saved file is loaded again, then the widgets with empty id are not visible/accessible in glade.

ProblemType: Bug
DistroRelease: Linux 18
Package: glade 3.20.0-0ubuntu1~xenial2 [origin: LP-PPA-gnome3-team-gnome3-staging]
Uname: Linux 4.7.10-040710-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
CurrentDesktop: X-Cinnamon
Date: Mon Jan 9 06:55:20 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-09-02 (128 days ago)
InstallationMedia: Linux Mint 18 "Sarah" - Release amd64 20160628
SourcePackage: glade
UpgradeStatus: No upgrade log present (probably fresh install)